Thank you very much bekateen for a very quick reply.
Now I am glad I know which Corys I have in my tank.

This is first time I have Corys so I will surely use this forum to learn stuff about them and maybe one day I will be successful in hatching and raising fry

Hi, I am new to this forum and would like to ask for help identifying my fish bought at local pet store as C. Punctatus.
I have been searching the web and to me they look more like C. Agassizii or C. Ambiacus.

They have grayish heads with some spotting and a golden like diagonal stripe between the ...